Tattoo

According to Sheldon, Penny has the Chinese character for "soup" tattooed on her right buttocks. Penny claims, it's the character for "courage".

Sheldon finds out when Penny dislocates her shoulder and he needs to help her getting dressed. Although she tells him not to look, he sees himself in the line of the heroes from ancient mythologies like Lot and his wife, Perseus and Medusa, Orpheus and Eurydice (0308):

Sheldon: They always look, it never ends well.